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Worldwide distributor of NSN parts and consumables located in the USA.

Rotary Switch

Model / MPN: M3900-8SB | NSN: 5930-01-353-8649
ITAR Registered seal

A switch actuated by a definite angular rotation of the switch shaft about its axis. For items having rated actuation travel and pressure characteristics, see switch, sensitive. Excludes relay, rotary; switch, stepping; and switch, telephone (as modified).

Product Details
NATO Stock Number
5930-01-353-8649
Sold in multiples of
1 EA
DEMIL
NO
Thread Class
2a single mounting facility
Thread Length
0.312 inches single mounting facility
Hazardous Locations/environmental Protection
Explosion proof and moisture resistant
Overall Length
1.636 inches
First Flat Length
0.230 inches single actuator and 0.270 inches single actuator
Flat Height
0.094 inches single actuator
Shaft Diameter
0.125 inches single actuator
Shaft Length
0.350 inches single actuator and 0.395 inches single actuator
Overall Diameter
Between 0.730 inches and 0.770 inches
Individual Section Quantity
2
Nonturn Device Type
Flatted bushing at 3: 00 o'clockflatted bushing at 9: 00 o'clock
Operating Tempurature Range
-65.0/+85.0 degrees celsius
Switch Contact Basic Design
Nonpile-up symmetrical
Pole Quantity
2 each section front
Throw Quantity
5 each section rear
Mounting Method
Threaded bushing w/panel seal single mounting facility
Thread Size
0.250 inches single mounting facility
Contact Voltage Rating In Volts
115.0 ac at sea level28.0 dc at sea level
Switch Actuator Indexing Position Quantity
5 single actuator
Shaft Type
Round, flatted single actuator
Terminal Type
Tab, solder lug
Contact Switching Action
Breaks before makes each section rear
Switch Actuator Positioning Increment
36.0 degrees single actuator
Switch Actuator Stop Device Type
Fixed-adjustable stops single actuator
Contact Load Current Rating
500.0 milliamperes resistive load ac at sea level250.0 milliamperes inductive load dc at sea level and 500.0 milliamperes resistive load dc at sea level
Style Designator
Tap, circular, bushing mount
Test Data Document
81349-mil-s-3786 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Thread Series Designator
Unef single mounting facility
Specification Data
81349-mil-s-3786/39 government specification

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M3900-8SB Cross Reference
  • M3786/39-8SB
  • MIL-DTL-3786/39
  • 71MAS36-02-2-05N
  • MIL-S-3786/39